Dermatitis herpetiformis is caused by gluten. Gluten is a protein found in some foods like bread, pasta, and pizza. When some people eat foods with gluten, their bodies react and cause a skin problem called dermatitis herpetiformis. The skin becomes itchy and bumpy.
Think of it like an allergy. Some people are allergic to certain foods, like peanuts or strawberries. And when they eat those foods, their bodies react and cause symptoms, like itching or a runny nose. In the same way, some people's bodies react to gluten, and that causes dermatitis herpetiformis.
But don't worry, your doctor can help figure out if gluten is causing your skin problem and what you can do to feel better.